composer require phpmailer/phpmailer
composer require league/oauth2-client
composer require league/oauth2-google

Old Email details:
username: ausfeed.online@gmail.com
password: ndjjUXq76dzbwRcV

Current Email details:
'UserName'              =>      'ausfeed@customclouddata.com',
'FromName'              =>      'Ausfeed Online',
'Password'              =>      'ndjjUXq76dzbwRcV', ];

see the following files, if you need to change email details:
/var/www/html/ausfeed.customclouddata.com/public/emailer/send.php
/var/www/html/ausfeed.customclouddata.com/xero/db_email_settings.php